[riverman]

I posted this problem in the new members forum but realized it probably would be better here. I just bought a 1988 Silver spur with 15K miles. When I start it everything is fine but after about 5 minutes an aggravating whine can be heard. It creeps up slowly. It seems to be coming from the drivers side left dashboard. My mechanic probed around the engine compartment with a stethoscope and heard a loud buzzing coming from the Frequency Valve which is part of the fuel injection system. We changed the valve and it seemed to be better but I can still hear it and I find it quite annoying. Any thoughts on what it could be ?